Squared Strike
I received the JFC-Tennis Squared Strike 1.25mm and in the white colour. Although I believe it comes in silver as well.
Stringing it was fairly easy in a Prestige mid. It acted like any other Poly. Not much friction but gets stiff towards the last few crosses. Started hitting...
Black Code is more spin-friendly. But I prefer Red Code since it is a better all-round string. I find it just does everything well. Plus I feel Red Code has a longer playing life and better tension maintenance.
The absolute best for control, power and durability. It's my go to string. Nothing else comes close. But you need well developed strokes plus fast swings to get the most from it.